Oil-pump for diesel engines.



G. RORABEGK.

OIL PUMP FOR DIESEL ENGINES.

APPLICATION FILED APR.19, 1913.

1,1 32,797. Patented Mar. 23, 1915. I 2 SHEETS-SHEET 1.

Fig- Z O. RORABEGK.

OIL PUMP FOR DIESEL ENGINES.

APPLICATION FILED APR. 19, 1913.

1, 1 32,797, Patented Mar. 23, 1915.-

2 SHEETS-SHEET 2.

} cmunn nomimcx, or-Damn, onrob I iTd-a ZZ whom; it may concern:

'rBe it known that' IfOLAlj'QE Rhiannon, citizen of the United States,residing at 'Day'ton," in the county of Montgomery and State -of'Ohio,have invented certain new'f and usefnllmprovements in Oil-Pumps'for"ters and figures of reference marked there- 9 "on, which form apart ofthis specification.- '15 This invention relates to improvements inection oil-4 pumps for constant pressure oil in bearings S in'the basemember 1. The

engines.

The object; of'the' invention is to provide. an 'oil .pump which'iscapable of delivering 20- to the cylinders of the engine varying quan- I-tities;of 'oiljatithe-times ofthe initialinjection thereof. Theoilstarts to inject'into" "the cylinder at the right time and thequantity ls f regulated by'a' valve which is con-f trolledby a governor.'Heretofore, it has bee'n'the custom to'inject the oil into thein-Ijection compressed'air before thecompressed air valve opened up. Inthiscase it was not j required to .time the oil: injection as accuratelyas is necessary with-my typefof fuel principles involved in" other typesof 'fuel valves and pumps. 1 v e 1 I The *fuel' valve which isapplicable to the present invention is described in mypendingapplication, Serial No. 38,227 filed December 23, 1912. v Anotherobject of said inventiton'. is .to'

i provide a pumpwhich is simple in construction andeflicient-in itsoperation. Referring to the accompanying drawings,

- Figure 1 is afront elevation of my improved pump, the same being asection on the line w-a of Fig. 2; Fig 2 is a section thereofapproximately on the line b--b of Fig. 1 Fig.

3 isa top plan view of'the actuating levers for the inlet valves; Fig. 4is a side e evation of the-same, partially in section; Fig. 5 is'afsection on the line 0-0 of Fig. 1; Fig. 6

is 'a section on the line d--d of Fig. 2;

Fig. 7 is a section on line e-e of Fig. 2;

' reference l i l.specifica tion of Letters Patent-' Pat tdMd gg 191a "lApplicationflled April 19,11918 1 Serial no; 762,501.

gear-and ratchetffor-the pjump.

3 In the specification and drawin gs, similar characters indicate;corresponding parts.

oil reservoir. 'The reservoirisfedwith'oil by supply'pumps,thei'cylinders 2 of which may be integral parts of the base member 1 asis shown in the drawings. The cylinders Referring-moreparticularly tothe draw "mgs, '1 irepresents a hollow base member; theloweranteriorjportion of'whi'ch formsan the Fig. 8 is a aani aw 'of-thefdriving I crank pins 6101';- a drive shaft? journaled said shaft 7 andthe plungers 13 connected thereto are driven from the crank" or shaft ofthe. engine (not shown) through a gear 9 freely mounted on said shaft 7.The gear 9 and shaft-7 are connected by'a ratchet tooth; 10 and pawl11,;whichen'ables "the shaft 7 to be actuated independently of the.=engine andgear -9 by acrank 12. Thefs up- Lply pumps are provided withinlet :valves 13 --which receive inlet pipes '14 extending from the mainsup l tank, and'fwith valves "15 discharginginto'the reservoir in' thebottom 'of the hollow base member .1 The'base member l is provided withover fiow walls 16 in one corner thereof which reservoiryand as thecapacity of the supply pumps is greater than the demands-of the enginecyhnders,the excess of oil constantly overflows the, walls 16 andreturnsto the main supply tank', thereby maintain ing a constant level in thereservoir.

1 The oil 's fed to the engine cylinders, from pumps provided with;plungers 17 extending from the cross-heads 4; through stuffing glands18' and into pump chambers 19 in a exhaust chambered member 20. Theinlet to "the chambers 19 is controlled by combined inlet and regulatingvalves 21 the stems 2,6 of

which extend through packing glands 22.

The outlets from the chambers 19 are controlled by check valves 23 whicheommunicate with the chambers 19 through passageways 24 and which areprovided with outlet pipes leading to the inlet valves of'the enginecylinders; Theinle't to the chambers. 19 from the reservoir inthe base 1is' cesses and ports 31. The valves 21 are I the upward stroke oftheplungers to regu-' opened during theqdownward or suction stroke of theplungers 17 to admit the oil into the chambers 19, and are opened duringvlate the amount. of oil fed to the engine cylinders. The stems 26 ofthe valves 21 extend through guides 32 and are provided with collars 33between which and the guides 32 springs 34 are mounted. The springs 34are instrumental in maintaining the valves 21 on their seats against thepressure of the oil. when it is being delivered by the plungers 17Mounted on theupper ends of the stems 26 are collar nuts 35 which arerigidly secured in adjusted positions byjam nuts 36. Adapted to engagethe under sides of the collars 35 are thebifurcated ends of levers 37the opposite ends of which I are pivotally connected at 38 to the upperends of connecting rods 39. The levers 37 are provided with projections40 forming fulcrums for said levers which turn upon the heads 41 ofscrews 42 adjustably mounted in the guides 32. The ends of theconnecting rods 39 opposite the pivots 38 are pivotally connected tolugs 42 on the crossheads4, said levers 37, are, therefore,'actuated bythe plungers 17. When the plungers 17 descend, the levers 37 elevate thevalves 21 thereby permitting the fuel oil to be drawn into the chambers19. When said plungers 17 ascend-they. initially inject the oil into thecylinders, and said point of injection will always be at the same timerelative to the stroke of the engine pistons. During the subsequentupward movement of the plungers 17 the valves 21 are opened to regulatethe amount of oil injected into the engine cylinders. The point at whichthe valves are opened, during the delivery stroke of the plungers 17,and the amount of oil injected in the cylinders are con trolled by agovernor which maintains a constant speed of the engine.

Pivotally connected at 38 to the upper ends of the rods 39 are the endsof levers 43, which are actuated by the plungers 17.

wearer The other ends of said levers 43 are fulcrumed on pivot'pins 44,therefore, are of a different class from levers 37., The said levers 43are provided with projections 45 at points intermediate their lengthswhich are adapted to engage'the collar nuts 35.

As the points of contact between the collar nuts 35 and the projections45 lie between the pivots 38 and the fulcrums 44, the valves the time atwhich the projections 45 engage the collar nuts 35 to open the valves 21will be regulated by the positions of the fulcrum pms 44. The fulcrumpins 44 are eccentrically mounted on a rocking member 46' journaled in abearing 47. Attached to one '21iwi1l be elevated by the levers 43 during1e the upward stroke of the plungers 17, and

of the pins 44 is a crank 48 which is connected to a governor or otherspeed regulating device, by a connecting rod 49. When the "speed-0f theengine increases, the fulcrum pins 44 are elevated and the valves'21 areelevated early in the delivery stroke of the plungers .17, thuspermitting a small cylinders and a smaller amount to be returned to thereservoir, thereby increasing the speed of the engine. While inthedrawings, I have shown the device as constructed in duplex form andadapted to supply oil to a double cylinder engine, ll wish it to beunderstood that the said device may be constructed for a single cylinderengine or an engine having any number of cylinders.

Without limiting myself to the precise arrangement shown and describedwhich may 1 'be varied within the scope of the claims, ll

claim- I 1. In a pump of the type specified, a cylinder, a pistontherein, a discharge valve, a

combined inlet and regulating valve, a lever actuated by said piston topositively open said combined inlet and regulating valve during theentire suction stroke of the piston, and a lever subject to variablemovement and actuated by said piston to open .the combined inlet andregulating valve during the discharge stroke of the piston,substantially as specified.

2. In a pump of the type specified, the combination of a pump chamberhaving a piston therein and a discharge valve, 0 a combined inlet andregulating valve, a lever adapted to positively actuate said combinedinlet and regulating valve during the suction stroke of the piston, andanother lever of a different class from said first named In testimpnywhereof I aflix my signaledver lglaving an imdjusgable iilcrum 2mgture,-in presence of two witnesses. a apte to positive y an varia opensai combined inlet and regulating vglve during CLAUDE RORABECK' 5 thelatter part of the discharge stroke of the Witnesses: piston, saidlevers being actuated by thepis- R. J. MCCARTY, ton, substantially asspecified. MATTHEW SIEBLER.

